Getting started with raspberry pi 3

By default, Raspbian provides username: pi and password: raspberry.. In this chapter, we learn how to connect Raspberry Pi 3 to a network through built-inEthernet and WiFi... Raspberry P

4.3 Connecting to a Network

4.3.1 Connecting a Network via Ethernet 4.3.2 Connecting a Network via WiFi 4.4 Auto Connect to WiFi

6.4.1 Setting up 6.4.2 Pairing 6.4.3 Transferring File 6.5 Building your own iBeacon

This book was written to help anyone who wants to get started in Raspberry Pi 3 Itdescribes all the basic elements of the Raspberry Pi 3 with step-by-step approach

Agus Kurniawan

Berlin, March 2016

1 Introduction to Raspberry Pi 3

The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computermonitor or TV, and uses a standard keyboard and mouse

(source: https://www.raspberrypi.org/help/what-is-a-raspberry-pi/)

Built on the latest Broadcom 2837 ARMv8 64bit processor the new generation Raspberry

Pi 3 Model B is faster and more powerful than its predecessors It has improved powermanagement to support more powerful external USB devices and further to customerfeedback based development the new Raspberry Pi 3 now comes with built-in wireless andBluetooth connectivity

The following is technical specification of Raspberry Pi 3 device:

Broadcom BCM2837 64bit ARMv8 Quad Core Processor powered Single BoardComputer running at 1.2GHz

You can see Raspberry Pi 3 model B device on the Figure below

After bought Raspberry Pi 3 from The Pi Hut (http://thepihut.com), I get the board asfollows

This chapter explains how to work with Operating System for Raspberry Pi 3

Raspberry Pi provides some Operating Systems you can use and run on the top ofRaspberry Pi 3 You can download these OS files on

http://www.raspberrypi.org/downloads

In this book, I use Raspbian “Jessie” OS

Raspbian is an Operating system based on Debian Linux for the Raspberry Pi hardware Irecommend you to download OS image file on http://www.raspberrypi.org/downloads For illustration, I use Raspbian Jessie OS

jessie.img file

After extracted this file, you will obtain *.img file, for instance, 2016-02-26-raspbian-2.2.1 Setup MicroSD Card

If we are working with Raspberry Pi 3 board, we need MicroSD card to extract this OSimage file I use MicroSD Card 16 GB

Wait it until done

Download Win32DiskImager on https://sourceforge.net/projects/win32diskimager/ Run Win32DiskImager and navigate Raspberry Pi image file

Now your Raspberry Pi 3 is ready to be deployed OS.

In this chapter we start to run and configure Raspberry Pi 3

Now you are ready to boot your Raspberry Pi Connect Monitor via HDMI, a keyboard viaUSB and power into Raspberry Pi

Turn on the power for your Raspberry Pi Raspbian OS will boot for the first time

If success, you will get the first screen of Raspberry Pi Jessie desktop as below

On desktop mode, if you want to work with Terminal, you can click black monitor icon,shown in Figure below.

After running Jessie OS, you can configure it by expanding Filesystem via raspi-config tooptimize your micro SD storage Type this command on Terminal

sudo raspi-config

Then, you get the following form

Select 1 Expand Filesystem After that, you are be required to restart Raspbian

Select your Geographic area

After that, Raspbian will configure your Timezone

Select I3 Change Keyboard Layout Choose your keyboard type and model.

It’s better to shutdown your Raspberry Pi If you don’t use it Please don’t turn off thepower directly

Write this script to shutdown and turn off your Raspberry Pi

$ sudo shutdown -h -P now

By default, Raspbian provides username: pi and password: raspberry If you want tochange password, you can do it by calling passwd

$ passwd

Then type the current password and new password

This chapter explains how to work with networking in Raspberry Pi 3

In this chapter, we learn how to connect Raspberry Pi 3 to a network through built-inEthernet and WiFi

Let’s start

Raspberry Pi 3 has built-in Ethernet and WiFi so we can connect to a network directly Wedon’t need additional network module

4.3.1 Connecting a Network via Ethernet

Connect Ethernet USB to Raspberry Pi and a network

Turn on Raspberry Pi 3 You can see the monitor and access it via Keyboard You alsoaccess it via SSH, read section 4.7

Select your SSID

If succeed, WiFi icon will show on the right toolbar

Then, you should get Network dialog

Save all settings Now try to reboot Raspbian.

By default, Raspberry Pi configures IP address in DHCP mode If you want to change tostatic IP Address, you edit interfaces file

If your Raspberry Pi already connected to Internet, you can browse the Internet Raspberry

Pi provides Epiphany as browser Click its icon, shown in Figure below.

Furthermore, a browser is opened Navigate to a specific URL If success, it show thetarget URL A sample output of browser can be seen in Figure below

By default, Raspbian Jessie has installed and enabled SSH service so we can use itdirectly

For testing, I used PuTTY, http://www.putty.org, application in Windows platform toremote Raspberry Pi via SSH

Fill IP Address of Raspberry Pi

You can get IP address your Raspberry Pi 3 board by checking it on your router Forinstance, my router detected my board MAC

Pi hostname By default, the Pi hostname is raspberrypi.

Then, click Open button If connected, you will get a security alert.

If you want to update your package repository, you can execute by writing this script

$ sudo apt-get update

Note: It needs the Internet connection

If you success, you will get xrdp dialog Fill Raspberry Pi account

If done, you will get Raspbian desktop

Fill IP address for your Raspberry Pi 3

If succeed, you should see Jessie desktop

This chapter explains how to work with development environment on Raspberry Pi 3

In this section, we learn several programming on Jessie OS on Raspberry Pi 3

Raspberry Pi Jessie provides Python for development by default so you can executePython code inside Raspberry Pi console

$ python

After that, you run Python command

Raspberry Pi also provides GCC inside package distribution You can check your currentGCC version by typing this command

If you are node.js lovers, Raspbian Jessie has installed for you.Try to check the node.js version

Now you can execute mynode.js file using node.js

$ node mynode.js

Scratch is a free desktop and online multimedia authoring tool that can be used by

students, scholars, teachers, and parents to easily create games and provide a steppingstone to the more advanced world of computer programming or even be used for a range

of educational and entertainment constructivist purposes from math and science projects,including simulations and visualizations of experiments, recording lectures with animatedpresentations, to social sciences animated stories, and interactive art and music

Further information about Scratch, you can read and learn it on https://scratch.mit.edu/

Now you can get Wolfram Mathematica for Raspberry Pi for free license You can findWolfram Mathematica on desktop

You can read how to use Wolfram Mathematica on this

site, http://www.wolfram.com/raspberry-pi/

I also wrote a book, Getting Started with Wolfram Language and Mathematica for

Raspberry Pi You can reach it on http://blog.aguskurniawan.net/post/pimath.aspx

Java also has installed on Raspbian Jessie You can verify it typing this command onTerminal

$ java -version

You should see Java version which installed on Raspberry Pi 3

Raspbian Jessie has BlueJ for Java IDE too

public class HelloWorld {

public static void main(String[] args) {

System.out.println("Hello, World");

}

}

$ javac HelloWorld.java

$ java HelloWorld

Program output:

This chapter explains how to work with built-in Bluetooth on Raspberry Pi 3.

In this chapter, we learn how to use built-in Bluetooth on Raspberry Pi 3 board Let’s start

Now my Macbook detected Raspberry Pi Bluetooth.

In this section, we want to pair my Macbook Bluetooth to Raspberry Pi Bluetooth

Firstly, I scan my Macbook Bluetooth using hcitool to retrieve MAC address of Macbook Bluetooth

In this section, we learn to manage Raspberry Pi 3 Bluetooth using GUI, Bluetooth Manager

Let’s start

6.4.1 Setting up

Firstly, you run Raspbian Jessie in desktop mode You should see Bluetooth Manager on Preferences menu, shown in Figure below

If you don’t see it, Raspbian Jessie may not install blueman You can install it using this command on Raspberry Pi Terminal

For example, Bluetooth Manager detected my Macbook Bluetooth

Select Adaptors Next, you can select Always visible

6.4.2 Pairing

In this section, we learn how to pair Raspberry Pi Bluetooth to other Bluetooth device How to pair?

Open Bluetooth Manager Search and find Bluetooth device which you want to pair After found, select menu Device -> Pair

You can select Random Passkey or Custom Passkey

On target Bluetooth machine, it should get notification for pairing

Click Close if done

On target Bluetooth, for instance, my Mackbook shown paired with Raspberry Pi Bluetooth

After paired with other Bluetooth device, we can transfer a file In this scenario, I use Macbook I should configure my Bluetooth can receive a file

On System Preferences, select Sharing.

Now we send a file from Raspberry Pi Select Bluetooth icon, select Send Files to Device

Choose a file

On target machine, Macbook, I got a confirmation, shown in Figure below

Click Accept so you will get a file

The last section, we try to build iBeacon using hcitool Firstly, we configure Bluetooth for iBeacon mode Type these commands

$ sudo hcitool -i hci0 cmd 0x08 0x0008 1E 02 01 1A 1A FF 4C 00 02 15 63 6F 3F 8F 64 91 4B EE 95 F7 D8 CC 64 A8 63 B5 00 00 00 00 C8

It will generate iBeacon data

On Beacon Scan application, it shows iBeacon data.

This chapter explains how to deploy LAMP stack on Raspberry Pi 3 board.

Firstly, we install Apache Server

$ sudo apt-get install apache2

The second step is to install MySQL Execute this command

$ sudo apt-get install mysql-server

In the middle of installing process, you will be asked to fill root password for MySQL

$ mysql version

You need MySQL driver for PHP to access MySQL database Execute this command to install PHP-MySQL driver

$ sudo apt-get install php5 php5-mysql

<p>List of database:</p>

<?php

$link = mysql_connect ('localhost', 'pi', 'raspberry');

$res = mysql_query ("SHOW DATABASES");

while ($row = mysql_fetch_assoc ($res)) {

You test it now Open your browser and navigate to URL where hellodb.php file is

located

This chapter explains how to work with GPIO on Raspberry Pi 3

General-purpose input/output (GPIO) is a generic pin on an integrated circuit whosebehavior, including whether it is an input or output pin, can be controlled by the user atrun time GPIO pins have no special purpose defined, and go unused by default

To understand GPIO on Raspberry Pi 3 board, you can see it in Figure below

(source: model-b-gpio-40-pin-block-pinout )

https://www.element14.com/community/docs/DOC-73950/l/raspberry-pi-3-See the pin 1 and pin 2 on physical board on the following Figure

In this section, we will focus on Raspberry Pi GPIO programming using Python Python and RPi.GPIO library, http://pypi.python.org/pypi/RPi.GPIO , have installed for you soyou can use them directly to access Raspberry Pi GPIO

Now you read all GPIO configuration using gpio command Type this command on Terminal

$ gpio readall

You can see pin mapping for Raspberry Pi 3 GPIO

You also can install RPi.GPIO library manually How to install?

For illustration, we will install RPi.GPIO 0.6.2 Firstly, we need Python developmentlibrary Type the following command

$ sudo apt-get install python-dev

Make sure your Raspberry Pi already connected to Internet network

Now you can download RPi.GPIO and install it For instance, I install RPi.GPIO 0.6.2

In this section, we learn how to write data using GPIO on Raspberry Pi We can use oneLED to illustrate our case

The LED is connected to GPIO pin 11 (GPIO17) LED ground pin is connected to GPIOGND

The following is my wiring

Now we create Python application to write data on GPIO We can use GPIO.output() towrite data, GPIO.HIGH and GPIO.LOW

The LED also is blinking.

You can learn Raspberry Pi GPIO by trying more practices I have written a book,Raspberry Pi I/O Programming Using Python This book helps you to get started

Raspberry Pi I/O programming This book uses Raspberry Pi 1 but it’s compatible withRaspberry Pi 2 Further information about this book, you can visit to my blog,

http://blog.aguskurniawan.net/post/Raspberry-Pi-IO-Programming-using-Python.aspx

This chapter explains how to access Raspberry Pi 3 via Serial Port.

To debug Raspberry Pi using GPIO serial through computer, we need USB TTL device There are a lot of USB TTL device, for instance, USB to TTL Serial Cable - Debug /

Console Cable for Raspberry Pi from Adafruit, http://www.adafruit.com/products/954

Another device, you can buy USB to TTL on Cooking-Hacks,

http://www.cooking-hacks.com/index.php/usb-to-ttl-converter-cp210.html

In this section, I used a Foca V2.1 FT232RL Tiny Breakout USB to Serial UART Interface from iteadstudio I bought it on

http://www.exp-tech.de/Shields/Foca-V2-1-FT232RL-Tiny-Breakout-USB-to-Serial-UART-Interface.html

By default, Raspbian disables serial debugging so we need to enable this feature On Terminal type the following command

$ sudo raspi-config

You will get a dialog Select 8 Advanced Options menu.

Then, select A8 Serial menu.

feature

If success, you will get a success confirmation

Now you can reboot your Raspbian by typing the command on Terminal

$ sudo reboot

How to implement?

It’s easy You can just connect Tx from USB TTL to Raspberry Pi UART0_TXD and USB TTL RX to Raspberry Pi UART0_RXD Some USB TTL must change them It means USB TTL TX should be connected to Raspberry Pi UART0_RXD and USB TTL RX to Raspberry Pi UART0_TXD (Optional) You can connect GND from USB TTL to GND of Raspberry Pi board

Here is a sample of connected hardware

Now your USB cable of USB TTL device is be connected to your computer You can use any serial application to execute

In this book, I used PuTTY,

http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html, and run it on my Windows OS

Run PuTTY and choose Serial for connection type Fill Serial line name, for instance, my Windows detected it on COM6 as below

Set 115200 for speed serial.

Click Serial on side menu and choose None for Parity and Flow control.

http://freeware.the-meiers.org

To use it, you can open Options menu and select Port and Baudrate on 115200.

On Terminal tab, you don’t configure anything.

Click OK button to save the configuration.

If you’re ready, you can click Open button on PuTTY You may press Enter on keyboard

when you see blank screen

If success, you will get the authentication form

Here is a sample of serial debugging output

Type username and password

You also can execute common commands such as ls.

If you have question related to this book, please contact me at aguskur@hotmail.com Myblog: http://blog.aguskurniawan.net